package com.example.demo.jvm;

import java.util.HashMap;
import java.util.Map;

/**
 * @author liweizhi
 * @date 2020/5/29
 */
public class Temp {
    public static void main(String[] args) {
        Map<String, Boolean> map = new HashMap<String, Boolean>();
        boolean b = (map != null ? map.get("Hollis") : false);
        System.out.println(b);
    }
}
